Yellow eyes can be a sign of jaundice, which can result from temporary or permanent liver damage. Any number of liver-metabolized drugs taken in sufficient quantities can have this effect if normal enzyme levels are disrupted. However, they are not permanent, when the liver recovers, the color goes back to normal. (Not sure about hepatitis because it's a chronic condition.)
If liver imbalance is the culprit, I would imagine this is most likely the result of someone having taken many vicodin or other prescription opiate that contains APAP, as the large amount of acetaminophen (APAP, generic name for tylenol) present can cause liver problems.
On the other hand, yellow eyes can be cause by sleep deprivation, which might be the result of amphetamine or a similar substance.
I suggest that maybe you can have a good rest.
